More with the C4 injector issue
Thread Starter
Instructor
Joined: Dec 2019
Posts: 167
Likes: 10
From: Corpus Christi Texas
More with the C4 injector issue
Hello all,
more on the injectors. My number 8 cylinder is cold. When I start the engine there is a very loud clicking sound the seems to come from the injectors and or the fuel rail. Put a stethoscope on it. Injectors are showing 17 ohms, power to the number 8 injector pulses between 12 ish and 20 volts, (could be reading that wrong). Pulled the plug and tested the wire, getting spark. When I disconnect the number 8 plug wire and start the motor the loud clicking stops. I went ahead and replaced the injector but that did not fix the issue. Any advice would be great.
more on the injectors. My number 8 cylinder is cold. When I start the engine there is a very loud clicking sound the seems to come from the injectors and or the fuel rail. Put a stethoscope on it. Injectors are showing 17 ohms, power to the number 8 injector pulses between 12 ish and 20 volts, (could be reading that wrong). Pulled the plug and tested the wire, getting spark. When I disconnect the number 8 plug wire and start the motor the loud clicking stops. I went ahead and replaced the injector but that did not fix the issue. Any advice would be great.
Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
Hello all,
more on the injectors. My number 8 cylinder is cold. When I start the engine there is a very loud clicking sound the seems to come from the injectors and or the fuel rail. Put a stethoscope on it. Injectors are showing 17 ohms, power to the number 8 injector pulses between 12 ish and 20 volts, (could be reading that wrong). Pulled the plug and tested the wire, getting spark. When I disconnect the number 8 plug wire and start the motor the loud clicking stops. I went ahead and replaced the injector but that did not fix the issue. Any advice would be great.
more on the injectors. My number 8 cylinder is cold. When I start the engine there is a very loud clicking sound the seems to come from the injectors and or the fuel rail. Put a stethoscope on it. Injectors are showing 17 ohms, power to the number 8 injector pulses between 12 ish and 20 volts, (could be reading that wrong). Pulled the plug and tested the wire, getting spark. When I disconnect the number 8 plug wire and start the motor the loud clicking stops. I went ahead and replaced the injector but that did not fix the issue. Any advice would be great.
Thread Starter
Instructor
Joined: Dec 2019
Posts: 167
Likes: 10
From: Corpus Christi Texas
Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
You think you have spark - so the next step is to verify fuel (although popping a new plug in cylinder #8 and trying again can't hurt) . TO do this - pull the fuel injector "manifold" off the engine and disconnect power to the ignition (but keep the injectors connected). While you watch - have someone crank the car over - are you getting fuel out of the number 8 injector ?
Thread Starter
Instructor
Joined: Dec 2019
Posts: 167
Likes: 10
From: Corpus Christi Texas
Thanks for the feed back, the funny thing is the super loud intermittent clicking coming from the general area of the 8th cylinder and injector. Anyway the cylinder is cold and I have air and spark. When I pulled the plug it was slightly fouled with carbon but was bone dry. The new injector made no difference. I will pull the rail and see if fuel is coming out of the injector. I will
place towels around the area to minimize mess. If there is no fuel I am
guessing electrical problems. Have a good evening.
place towels around the area to minimize mess. If there is no fuel I am
guessing electrical problems. Have a good evening.
Drifting
Joined: Jul 2022
Posts: 1,805
Likes: 365
From: Central Florida
Check the distributor cap for a loose wire even though you get some spark. It can also be the distributor cap at a slight angle or loose. Check the rotor and cap for rub marks or broken tabs.
Racer
Joined: Oct 2012
Posts: 280
Likes: 82
From: Indiana
Did you check your spark plug wires? You could have a damaged spark plug wire and the clicking your hearing is the spark being grounded somewhere around the spark plug. Which would keep your plug from firing.
